26 replies to this topic

[fruitfulsteve]

Synthetic material generally doesn't bio degrade, also i think a differant addesive would have to be used to fix a synthetic material perhaps varnish?

[CCH Concepts]

not being an expert. the soak idea sounds good, i would say if you cut off the mouth of the soak you could do larger shell, being even better because the size of the shell would stretch the soak to take up the elastic limit. then one twist and back the other way. until you have no soak left.

what about womens tights?

[crystal palace fireworks]

I wonder if those sock like injury support bandages would be any good.

[CCH Concepts]

tubular bandages. there very strong and will stretch along way. could be interesting.

Edited by CCH Concepts, 21 November 2009 - 12:41 PM.

[fruitfulsteve]

C.P.F/cch concept both interesting ideas and definitely worth a try.
Still a little disappointed we haven't heard from Digger yet!!!(or are you busy trying to sell a certain machine)

[seymour]

I've made some 10g salute inserts, which I pasted with wax-soaked strips of cloth. I am hoping they are sealed, but if not, the 8" shell containing them might burst a bit differently to how I'd like.. Not the same thing as you are talking about I know, but it reminded me.

Speaking of those two eight inch shells,the only ones I ever made, I want to fire them, they have been in someone elses magazine for over a year now...

[crystal palace fireworks]

Also, might it be an idea to spray/coat shell casings with a resin (to water proof) and then a tack glue (left partially to dry), and then dip into a bucket of finely grated paper machie/wall paper paste slurry?,...a frame could be made to accomodate to hang many hemisphers at once to dry at the same time,...they could then be re-dipped in the slurry to achieve required thickness.

[Pretty green flames]

Also, might it be an idea to spray/coat shell casings with a resin (to water proof) and then a tack glue (left partially to dry), and then dip into a bucket of finely grated paper machie/wall paper paste slurry?,...a frame could be made to accomodate to hang many hemisphers at once to dry at the same time,...they could then be re-dipped in the slurry to achieve required thickness.

This will hardly provide any stenght, you need long oriented fibres to give the casing strenght, paper mache will provide no such thing.

[crystal palace fireworks]

This will hardly provide any stenght, you need long oriented fibres to give the casing strenght, paper mache will provide no such thing.

Yeah, good point about the paper fibres not being strong enough,... perhaps more experimentation with some added strands of glass fibre matting + hardner might prove interesting....maybe even using sawdust!

I guess it also depends on construction techniques in respect of finding ways to compress the final casings for binding & strength.

[CCH Concepts]

Yeah, good point about the paper fibers not being strong enough,... perhaps more experimentation with some added strands of glass fiber matting + hardner might prove interesting....maybe even using sawdust!

I guess it also depends on construction techniques in respect of finding ways to compress the final casings for binding & strength.

having used glass fiber my self i will say the stuff is very hard. what might be a good idea is to use a mold and make your own shells out of it, then just glue them together with the resin at the end. leave a inset lip around the edge of each shell, when then they come together few strips of fiber glass and some resin and it will be as if there is now seam. my only concern is as i said its very hard and might cause shrapnel.

[a_bab]

Not only it will cause shrapnel. I guess a fiber glass pasted shell (with the resin and everything. Put the gelcoat too ) would be more likely a salute. I doubt the stars would survive the blast. Sommething I'd try though, just for the sake of it.

[CCH Concepts]

well I'm thinking you could make the casing as thin as needed, would need experimentation. but also you could but in break lines, just a load of small holes in lines to make the shell break in a way thats good for the stars, thats if its needed. but i do think it would make amazing salutes.